Organiser Simone Webb told AAP: "We are not saying he is a rapist, but they are the accusations and he needs to face the justice process."

Assange is wanted in Sweden for questioning over allegations of sexual assault against two women.

He is avoiding extradition by remaining inside the Ecuadorean embassy after being granted asylum by the Latin American nation.

Asked by an Oxford student on Wednesday how much longer he'd stay in the embassy, Assange replied: "We will see. Who knows."

The Australian received support from former British ambassador to Uzbekistan Craig Murray, who told the debating society event he was accused of rape after speaking out 10 years ago about intelligence agencies using torture.

"I was not guilty (but) it took me years to clear my name," Murray said.

"Anyone who believes governments do not do that kind of thing to whistleblowers is naive."

Murray said WikiLeaks was needed because governments couldn't be trusted.